Electrochemical Control of Solution Viscoelasticity

溶液粘弹性的电化学控制

• 批准号: 17550137
• 负责人: ABE Masahiko
• 金额: $ 2.44万
• 依托单位: Tokyo University of Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17550137/
• 关键词: Surfactant; Worm-like Micelle; Redox reaction; Ferrocene; Vicoelasticity; Transmission Electron Microscopy; Molecular Assembly; Electrochemistry; レオロジー; cryo-TEM; 電気分解; 酸化・還元; サリチル酸ナトリウム

A novel way of controlling fluid viscoelasticity using a "Faradaic (redox) reaction was studied. The system is based on a cationic redox-switchable ferrocenyl surfactant [(11-ferrocenylundecyl) trimethylammonium bromide, FTMA] that self-assembles into worm-like micelles in the presence of sodium salicylate (NaSal). The ferrocenyl group (reduced form) in the molecule is hydrophobic, while the ferricinium cation (oxidized form) acts as a hydrophilic moiety. This property gives remarkable change in the hydrophilic-lipophilic balance of FTMA, thereby changing its aggregation state.An aqueous solution of mixed FTMA(reduced form) and NaSal exhibited a remarkable viscoelasticity. The viscoelastic behavior corresponded to a Maxwell-model and the zero shear viscosity was four orders of magnitude (15 Pass) higher that the viscosity of water (1x 10-3 Pass). Considerably elongated aggregates that are entangled with each other were observed on the FF-TEM micrograph. The high viscoelasticity observed for the mixed solution can therefore be ascribed to an entangled network of worm-like micelles.This highly viscoelastic aqueous mixture was electrolyzed at +0.5 V vs. SCE. The viscosity of the system dramatically decreased and the elasticity disappeared after electric oxidation. The oxidized sample was a Newtoniam fluid and its viscosity had a value of 2.5x 10-3 Pass, which is about 1/6000 of the zero shear viscosity of the reduced sample. This remarkable viscoelasticity decrease is caused by a significant change in the aggregation state of FTMA and NaSal mixture from worm-like micelles to monomers and/or other smaller aggregates due to the enhanced hydrophilicity of FTMA. The method that we report are applicable to the controlled release of substances such as dyes and perfumes entrapped in an entangled network of worm-like micelles, ink for inkjet printers, flow rate controlling systems using electrical signals, clutches for transmission and valves.

研究了一种利用法拉第（氧化还原）反应控制流体粘弹性的新方法。该系统是基于阳离子氧化还原开关二茂铁基表面活性剂[（11-二茂铁十一烷基）三甲基溴化铵，FTMA]，自组装成蠕虫状胶束在水杨酸钠（NaSal）的存在下。分子中的二茂铁基基团（还原形式）是疏水性的，而铁阳离子（氧化形式）充当亲水性部分。这种性质使FTMA的亲水-亲油平衡发生显著变化，从而改变了其聚集状态。FTMA（还原型）与NaSal的混合水溶液表现出显著的粘弹性。粘弹性行为对应于Maxwell模型，并且零剪切粘度比水的粘度（1 × 10-3通过）高四个数量级（15通过）。在FF-TEM显微照片上观察到彼此缠结的相当长的聚集体。混合溶液中观察到的高粘弹性可归因于蠕虫状胶束的缠结网络。这种高粘弹性的含水混合物在+0.5V vs. SCE下电解。电氧化后体系的粘度急剧下降，弹性消失。氧化的样品是牛顿流体，其粘度值为2.5 × 10-3 Pass，约为还原样品零剪切粘度的1/6000。这种显著的粘弹性降低是由FTMA和NaSal混合物的聚集状态从蠕虫状胶束到单体和/或其他较小聚集体的显著变化引起的，这是由于FTMA的亲水性增强。我们报告的方法适用于控制释放的物质，如染料和香料陷入蠕虫状胶束的缠结网络，喷墨打印机的墨水，使用电信号的流速控制系统，离合器传输和阀门。

项目成果

Preparation of Inorganic Thin Films using a Micelle Disruption Method.

使用胶束破坏法制备无机薄膜。

• 发表时间: 2005
• 期刊: Material Technology 23(1)
• 作者: H.Imamura;H.Yoshioka;S.Nakano;K.Tsuchiya;T.Ohkubo;S.Okabe;H.Sakai;Y.Nihei
• 通讯作者: Y.Nihei

Effects of Dialkyldimethylammonium Bromides on the Membrane Properties of Cationic Liposomes.

二烷基二甲基溴化铵对阳离子脂质体膜性能的影响。

• 发表时间: 2005
• 期刊: Journal of Olec Science 54(7)
• 作者: A.Inagaki;K.Tsuchiya;H.Sakai;T.Imura;T.Ohkubo;N.Tsubaki;S.Yokoyama;M.Abe
• 通讯作者: M.Abe

Phase behavior of mixed solution of a glycerin-modified cationic surfactant and an anionic surfactant.

甘油改性阳离子表面活性剂和阴离子表面活性剂混合溶液的相行为。

• 发表时间: 2007
• 期刊: Journal of Colloid and Interface Science 312
• 作者: Koji Tsuchiya;Jun Ishikake;Tae Seong Kim;Takahiro Ohkubo;Hideki Sakai;Masahiko Abe;Masahiko.
• 通讯作者: Masahiko.

Synthesis and properties of a microtube photocatalyst with photoactive inner surface and inert outer surface.

具有光活性内表面和惰性外表面的微管光催化剂的合成和性能。

• 发表时间: 2007
• 期刊: Journal of Photochemistry and Photobiology, A : Chemistry 185(2-3),
• 作者: K.Mitsuhashi;N.Tagami;K.Tanabe;S.Suzuki;S.Iwanaga;T.ohkubo;H.Sakai;M.Koishi;M.Abe
• 通讯作者: M.Abe

Preparation of nanocapsules with alginate/polylysine complex wall

海藻酸盐/聚赖氨酸复合壁纳米胶囊的制备

• 发表时间: 2006
• 期刊: Journal of Oleo Science 55(12)
• 作者: M. Abe;K. Tanaka;A. Nakayama;T. Kondo;K. Tsuchiya;V. Tantayakom;T. Ohkubo;H. Sakai
• 通讯作者: H. Sakai